Angular
Building a Notification System in Angular Using RxJS
Introduction
Users experience enhanced interfaces with Angular systems since they receive immediate event feedback through active notifications. The upcoming blog post will demonstrate how to construct a fundamental Angular notification solution through RxJS application.
Create a Notification Service
Notifications will be controlled by RxJS Subject.
import { Injectable } from '@angular/core';import { BehaviorSubject } from 'rxjs';@Injectable({ providedIn: 'root' })export class NotificationService {private notificationSubject = new BehaviorSubject<string | null>(null);notifications$ = this.notificationSubject.asObservable();showNotification(message: string) {this.notificationSubject.next(message);setTimeout(() => this.notificationSubject.next(null), 3000); // Auto-hide after 3s}}Create a Notification Component
This subscription will enable the component to show messages from notifications$.
import { Component } from '@angular/core';import { NotificationService } from '../services/notification.service';@Component({selector: 'app-notification',template: `<div *ngIf="notification" class="notification">{{ notification }}</div>`,styles: [`.notification {position: fixed; top: 10px; right: 10px;background: #333; color: #fff; padding: 10px; border-radius: 5px;}`]})export class NotificationComponent {notification: string | null = null;constructor(private notificationService: NotificationService) {this.notificationService.notifications$.subscribe(message => {this.notification = message;});}}Use the Notification System
The system requires an instance of NotificationService at locations such as button clicks.
import { Component } from '@angular/core';import { NotificationService } from '../services/notification.service';@Component({selector: 'app-home',template: `<button (click)="sendNotification()">Show Notification</button>`})export class HomeComponent {constructor(private notificationService: NotificationService) {}sendNotification() {this.notificationService.showNotification('Hello, this is a notification!');}}Conclusion
The Angular application utilizes RxJS BehaviorSubject to develop a basic reactive notification system. The application benefits from this method by providing a smooth and expandable solution for handling notifications throughout its system.
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